<template>
    <!-- 收获地址 -->
    <van-contact-card type="edit" :name="`${address.name} ${address.region_text}`" :tel="address.tel" v-if="Object.getOwnPropertyNames(address).length > 0" @click="OnAddressSelect"  />
    <van-contact-card type="add" v-else @click="AddressShow = true"  />

    <!-- 商品卡片 -->
    <van-card
        v-for="(item, key) in CartList"
        :thumb="item.product.thumb_text"
        :num="item.nums"
        @click-thumb="ToProductInfo(item.proid)"
    >
        <template #title>
            <div class="title" @click="ToProductInfo(item.proid)">{{item.product.name}}</div>
        </template>

        <!-- 卡片的插槽部分 -->
        <template #desc v-if="item.attrs">
            <van-tag v-for="(attr,index) in item.attrs" :key="index" class="tag" type="primary">{{attr.value}}</van-tag>
            <van-tag class="tag" type="warning" v-if="item.type === 'live'">直播商品</van-tag>
        </template>

        <template #desc v-else>
            <van-tag class="tag" type="danger">无规格数据</van-tag>
            <van-tag class="tag" type="warning" v-if="item.type === 'live'">直播商品</van-tag>
        </template>

        <template #price>
            <div class="price">单价：￥{{item.price}}</div>
            <div class="price">合计：￥{{item.total}}</div>
        </template>
    </van-card>

    <van-cell title="支付方式" :value="PayActive.text" is-link @click="PayShow = true" />

    <!-- 支付方式的选择器 -->
    <van-popup 
        v-model:show="PayShow"
        position="bottom"
        round
    >
        <van-picker
            title="选择支付方式"
            :columns="PayList"
            @cancel="PayShow = false"
            @confirm="OnPayConfirm"
        />
    </van-popup>

    <!-- 优惠券单元格 -->
    <van-coupon-cell
        :coupons="CouponList"
        :chosen-coupon="CouponActive"
        @click="CouponShow = true"
    />

    <!-- 优惠券列表 -->
    <van-popup
        v-model:show="CouponShow"
        round
        position="bottom"
        style="height: 90%; padding-top: 4px;"
    >
        <van-coupon-list
            :coupons="CouponList"
            :disabled-coupons="NotCouponList"
            :chosen-coupon="CouponActive"
            :exchange-button-disabled="true"
            :show-exchange-bar="false"
            @change="OnCouponChange"
        />
    </van-popup>

    <!--订单备注 -->
    <van-field 
        v-model="remark"
        rows="2"
        autosize
        label="订单备注"
        type="textarea"
        maxlength="120"
        placeholder="请输入订单备注"
        show-word-limit
    />

    <!-- 添加收货地址 -->
    <van-popup 
        v-model:show="AddressShow"
        position="bottom"
        round
    >
        <van-address-edit 
            show-set-default
            :area-list="areaList"
            :area-columns-placeholder="['请选择', '请选择', '请选择']"
            :address-info="AddressInfo"
            @save="OnAddressAdd"
        />
    </van-popup>


    <!-- 提交动作栏 -->
    <van-submit-bar text-align="left" :price="total" button-text="确认支付" @submit="OnSubmit" />
</template>

<script setup>
    // 引入地区数据
    import { areaList } from '@vant/area-data';
    const { proxy } = getCurrentInstance();

    const business = proxy.$business;
    const address = ref({});
    const CartList = ref([]);
    const cartids = ref(proxy.$route.query.cartids ?? 0);

    // 订单备注
    const remark = ref('');

    // 支付方式
    const PayShow = ref(false);
    const PayActive = ref({text: '余额支付', value: 'money'});
    const PayList = ref([
        {text: '余额支付', value: 'money'},
        {text: '微信支付', value: 'wx'},
        {text: '支付宝支付', value: 'zfb'},
    ])

    // 优惠券
    const CouponList = ref([]);
    const NotCouponList = ref([]);
    const CouponShow = ref(false);
    const CouponActive = ref(-1);

    const AddressInfo = ref({});
    const AddressShow = ref(false);

    onBeforeMount(() =>
    {
        GetAddressData();
        GetCartData();
        GetCouponData();

        AddressInfo.value = {
            name: business.value.nickname,
            tel: business.value.mobile,
            areaCode: business.value.district || business.value.city || business.value.province,
        }
    })

    const GetAddressData = async () =>
    {
        // 先判断cookie当中是否存在缓存,如果有缓存就拿缓存的数据，没有缓存就接口请求
        let cached = Object.getOwnPropertyNames(proxy.$address.value).length > 0 ? proxy.$address.value : null;

        if(cached)
        {
            address.value = cached;

            return false;
        }

        let params = {
            busid:business.value.id
        }

        let result = await proxy.$POST({
            url:'/cart/address',
            params
        })

        if(result.code === 1)
        {
            address.value = {
                id:result.data.id,
                name:result.data.consignee,
                tel:result.data.mobile,
                region_text:result.data.region_text + result.data.address
            }
        }
    }

    const GetCartData = async () =>
    {
        // 先判断本地存储当中是否存在缓存,如果有缓存就拿缓存的数据，没有缓存就接口请求
        let cart = Object.getOwnPropertyNames(proxy.$cart.value).length > 0 ? proxy.$cart.value : [];

        if(cart.length > 0 && !cartids.value)
        {
            CartList.value = cart;

            return false;
        }

        let params = {
            cartids:cartids.value,
            busid:business.value.id
        }

        let result = await proxy.$POST({
            url:'/cart/confirm',
            params
        })

        if(result.code === 1)
        {
            CartList.value = result.data;

            // 把商品规格转换对象
            CartList.value.map(item => item.attrs = JSON.parse(item.attrs));
        }else
        {
            proxy.$fail({
                message:result.msg,
                onClose:() => proxy.$router.back()
            })
        }
    }

    const GetCouponData = async () =>
    {
        let params = {
            busid:business.value.id
        }

        let result = await proxy.$POST({
            url:'/cart/coupon',
            params
        })

        if(result.code === 1)
        {
            for(let item of result.data.CouponList)
            {
                CouponList.value.push({
                    id:item.id,// 领取优惠券记录id
                    name:item.coupon.title,// 优惠券名称
                    startAt:item.coupon.createtime,// 优惠券开始时间
                    endAt:item.coupon.endtime,// 优惠券结束时间
                    rate: item.coupon.rate,// 折扣率
                    valueDesc: `${item.coupon.rate*100}`,// 折扣券优惠金额文案
                    unitDesc: '折',// 单位文案
                    condition:item.coupon.status_text,// 满减条件
                })
            }

            for(let item of result.data.NotCouponList)
            {
                NotCouponList.value.push({
                    id:item.id,// 领取优惠券记录id
                    name:item.coupon.title,// 优惠券名称
                    startAt:item.coupon.createtime,// 优惠券开始时间
                    endAt:item.coupon.endtime,// 优惠券结束时间
                    rate: item.coupon.rate,// 折扣率
                    valueDesc: `${item.coupon.rate*100}`,// 折扣券优惠金额文案
                    unitDesc: '折',// 单位文案
                    condition:item.coupon.status_text,// 满减条件
                })
            }
        }
    }

    const OnAddressAdd = async (values) =>
    {
        // 组装数据
        let params = {
            busid: business.value.id,
            consignee: values.name,
            address: values.addressDetail,
            mobile: values.tel,
            status: values.isDefault ? 1 : 0,
            code: values.areaCode,
            action:'confirm'
        }

        // 发送请求
        let result = await proxy.$POST({
            url: "/address/add",
            params
        })

        if(result.code === 1)
        {
            proxy.$success({
                message: result.msg,
                onClose: () =>{

                    AddressShow.value = false;

                    address.value = {
                        id:result.data.id,
                        name:result.data.consignee,
                        tel:result.data.mobile,
                        region_text:result.data.region_text + result.data.address
                    }

                    // 更新
                    proxy.$address.value = address.value;
                }
            })
        }else
        {
            proxy.$fail(result.msg);
        }
    }

    const OnAddressSelect = () =>
    {
        proxy.$router.push({path: '/address', query: {action: 'select'}});
    }

    const total = computed(() => {
        let total = 0;
        
        CartList.value.map((item) => total += parseFloat(item.total));

        // 使用优惠券
        if(CouponActive.value != -1)
        {
            let rate = CouponList.value[CouponActive.value].rate;

            total = (total * rate).toFixed(2);
        }

        return parseFloat(total * 100);
    })

    const OnPayConfirm = ({selectedOptions}) =>
    {
        PayShow.value = false;
        PayActive.value = selectedOptions[0];
    }

    const ToProductInfo = (proid) => proxy.$router.push({path:'/product/info',query:{proid}});

    const OnCouponChange = (index) =>
    {
        // 选中的索引
        CouponActive.value = index;

        CouponShow.value = false;

        if(index !== -1)
        {
            // 选中的优惠券
            let coupon = CouponList.value[index];

            // 优惠后总价
            let total = 0;

            // 计算商品的总价
            CartList.value.map(item => total += parseFloat(item.total));

            // 保留两位小数点
            total = total.toFixed(2);

            // 折扣率
            let rate = coupon.rate ? coupon.rate : 1;

            // 优惠后的总价
            let RatePrice = (parseFloat(total) * parseFloat(rate)).toFixed(2);

            let CouponPrice = (parseFloat(total) - parseFloat(RatePrice)).toFixed(2);
            
            CouponList.value[index].value = parseFloat(CouponPrice) * 100;
        }
    }

    const OnSubmit = async () =>
    {
        if(cartids.value)
        {
            let params = {
                busid:business.value.id,
                cartids:cartids.value,
                addrid:address.value.id,
                pay:PayActive.value.value,
                remark:remark.value
            }

            if(CouponActive.value !== -1)
            {
                params.couponid = CouponList.value[CouponActive.value].id;
            }

            let result = await proxy.$POST({
                url:'/order/add',
                params
            })

            if(result.code === 1)
            {
                // 如果url存在，直接跳转订单详情
                if(result.url)
                {
                    proxy.$success({
                        message:result.msg,
                        onClose:() =>
                        {
                            proxy.$router.push({path:result.url,query:result.data,replace:true});
                        }
                    })
                }else
                {
                    // 跳转收银台
                    proxy.$router.push({path:'/business/cashier',query:{payid:result.data.id}});
                }
            }else
            {
                proxy.$fail(result.msg);
            }
        }else
        {
            // 从CartList提取需要的数据
            let info = CartList.value[0];

            // 组装数据
            let params = {
                busid:business.value.id,
                addrid:address.value.id,
                pay:PayActive.value.value,
                remark:remark.value,
                proid:info.proid,// 商品主键
                price:info.price,// 商品价格
                nums:info.nums,// 商品数量
                attrs:info.attrs.length > 0 ? JSON.stringify(info.attrs) : '',// 已选择商品属性
            };

            // 是否使用优惠券
            if(CouponActive.value !== -1)
            {
                params.couponid = CouponList.value[CouponActive.value].id;
            }

            let result = await proxy.$POST({
                url:'/order/buy',
                params
            })

            if(result.code === 1)
            {
                // 如果url存在，直接跳转订单详情
                if(result.url)
                {
                    proxy.$success({
                        message:result.msg,
                        onClose:() =>
                        {
                            proxy.$router.push({path:result.url,query:result.data,replace:true});
                        }
                    })
                }else
                {
                    // 跳转收银台
                    proxy.$router.push({path:'/business/cashier',query:{payid:result.data.id}});
                }
            }else
            {
                proxy.$fail(result.msg);
            }
        }
    }

</script>

<style scoped>
    .van-card{
        background-color:#fff;
    }

    :deep(.van-card__bottom){
        position: relative;
    }

    :deep(.van-card__num){
        position: absolute;
        bottom: 0px;
        right: 5px;
    }

    .title{
        font-size:14px;
        font-weight: bold;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        margin-bottom: 5px;
    }

    .tag{
        margin-right:5px;
    }

    .price{
        font-size:12px;
        font-weight: bold;
    }

    /* 姓名只一行显示，超出隐藏 */
    :deep(.van-contact-card__title) div:first-child{
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
    }
</style>